bobbins



No. 8,488. N PATENTED NOV. 4, 1851. L. S. ROBBINS.

T-ANNERS OIL FROM ROSIN.

2 SHEETS-SHEET 2.-

Fay. J.

UNIT STATES L. s. ROBBINS, on NEW YORK; N. Y.

IMPROVEMENT l-N TANNERS O'lL .FROM' ROSIN.

Specification forming part of Letters Patent No. 8,488, dated November 4, 1851.

To all whom it may concern.-

Be it, known'that I, LOUIS S. Returns, of the city, county, and State of New York, have invented or produced a new product'or manufacture whichI denominate Robbins Gnrriers Oil or Robbins Tanners Oil and I do hereby declare that the following is a full and exact description of the method or process by which I produce the same, reference being had to the accompanying drawings, making a part of this specification.

Figure 1 is a vertical sectioniof a" distilling apparatus; Fig. 2, a vertical section of a bleaching and purifying kettle, and Fig. 3 a top "iew of, the'said kettle.

A is the body of the still, which I. shall \hereinal'ter designateby the word still B, a curved pipe connected with the top of. the still; 0, a movable joint of pipe for connecting the curved still-neck B with the-still-worm D; F, a steam-pipe passing through a close joint in the side of the still, and thence down its inner side and along its bottom to near the center-thereof, where it is curved into a circular or spiral form around thecenter of stillbottom, and is perforated with holes for-the escape of steam into the still, to be used as an auxiliary in the process of producing my curriers' oil or tanuers oil.

p' is a steam-pipe passing through a close joint in the side of the still, and terminating in aspherical perforated head or coil, 11, in the upper portion of the still. 7 r

A thermometer must be combined with the still in such a manner as to indicate the temperature of the interior'thereof. I'make use.

of Fahrenheits thermometer, and consequent ly all allusions to temperature-in. this specification refer to that instrument.

K is the bleachingand purifying kettle. Z is a steam-pipe combined therewith in such a f manner as to enable the temperature ofthe oil .to heraisedwhen placed in the said kettle;

and m is-a steam-pipeterminating-with a per;

forated head, 12, or coil, near the center'of the bottom of the kettle, -throu gh which steam is injectedinto"the oil, for the purpose hereinafter setforth.

The-following is a description of the process bywhich-I produce my new curriers oil or tanners'oil, to wit: Place in the still a qu-an-'- tity ofoil whichjhas been distilled from rosin. at-a range of temperaturc'of about 600?, as described ina patent'issued tome and hearing the same date with-the present patent.

I1 1troduce,also intotlie said. still,jcithcr before or after, or with the oil, .a quantity of slaked lime equal to about five per cent. of the oil placed therein, and then close the man-hole plate and lute in the usualmanner. When thusprepared, make'a fire under thestill-and so regulate it as to gradually raise the temperature within the still to 600, and retain it as near to that degree of heatas possible till the" process is completed. When the temperature of the interior of the still reaches to about 300 of heat inject steam into the still through pipe F, and whenits temperature reaches 600 of heat inject steam into the still through the pipe -Oil willcommencepassing off from the still in the form of vapor .as soon as the interior temperature thereof reaches to 600 of heat, and about this range of temperature must'be maintained within the still until all the oil contained therein has been volatilized. The volatilized oil, mixed with the steam injected .intothe top and bottom of the still, will pass into and e condensed in the worm 1'), and thence flow into a suitable receiving-vessel. The steam injected into the bottom ol' the still aids in volatilizing the oil, and the steam injected intothe top of the still serves the purpose of purifying and partially bleaching the oil when in a volatilized state. The oil produced .by theaforesaid process of dis tillation must be again distilled in precisely the same jmanner as that before described. save that in place of the slaked line employed in thatprocess, a similar proportional quantity of caustic lime must be placed in thest-ill with the oil. The oil produced by this last process of distillation must now be placed'in the open purifying-kettle K, and, after raising its temperature to about the range of 225 by means of the steam-pipe Z, steam must be injected into the oil through the steanhpipe m until the oil is fixed, and until all the acid and coloring-matter produced by theactio'n of the atmosphere are; expelled therefrom, when-it will be .foundtobe quite liinpid' and ready ferns s WVhat I claim as my inveiition, and" desire to secureby Letters Patent, is+- 1. The new and original product or inanu: factnre which I 'denomina'te' Rohbinsitan ners oil 'or. Robbins? curriers' oil, the process-of producingwhich I haveherein'fully .set forth. r

2. Every use and application of my said oil.. Witnesses: v LQUIS'S ROBBINS.

7;. 0. Rossms, .l. S. Baowrr. 

